CN116408936A

CN116408936A - Appearance part, household appliance and mold

Info

Publication number: CN116408936A
Application number: CN202111676865.6A
Authority: CN
Inventors: 阳涛; 李朝伟; 李林仕; 龙云钲; 李锦彬; 刁文志
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-07-11

Abstract

The invention provides an appearance part, a household appliance and a mold, wherein the appearance part is a spraying-free injection molding part, the appearance part comprises an appearance part body, the appearance part body comprises a grid structure, and the grid structure is symmetrically arranged relative to a reference surface; the appearance piece body is provided with an appearance surface and a non-appearance surface, wherein the non-appearance surface is provided with a pouring gate forming area corresponding to a pouring gate of the die; the grid structure comprises a first component, a second component and a third component which are sequentially connected along the direction vertical to the reference surface, wherein the widths of the first component, the second component and the third component in the direction vertical to the reference surface are equal; wherein the gate molding region is located on the second component. The appearance part solves the problem that the spraying-free injection molding part in the prior art is easy to generate appearance defects.

Description

Appearance part, household appliance and mold

Technical Field

The invention relates to the field of household appliances, in particular to an appearance part, a household appliance and a mold.

Background

At present, the household appliances generally adopt a spraying process to carry out surface treatment on injection molding parts so as to realize improvement of various colors and appearance textures, and can mask part of appearance defects, but the problems of high cost and environmental protection exist. Therefore, the spraying-free technology can be adopted to replace and make up the spraying process problem, and the injection molding part of the spraying-free material has unique light and shadow effect and metallic luster after being molded, and can achieve the appearance effect comparable to or better than spraying without secondary treatment. The technology has the advantages of excellent function, low cost, environmental protection and the like.

However, the spray-free material is very easy to have appearance defects such as flow marks, welding marks, gate marks and the like in the injection molding process, the occurrence position or degree is difficult to predict, and the consistency is poor.

Disclosure of Invention

The invention mainly aims to provide an appearance part, a household appliance and a mold, which are used for solving the problem that a spraying-free injection molding part in the prior art is easy to generate appearance defects.

In order to achieve the above object, according to one aspect of the present invention, there is provided an exterior part, which is a spray-free injection molded part, the exterior part including an exterior part body including a grill structure symmetrically disposed with respect to a reference surface; the appearance piece body is provided with an appearance surface and a non-appearance surface, wherein the non-appearance surface is provided with a pouring gate forming area corresponding to a pouring gate of the die; the grid structure comprises a first component, a second component and a third component which are sequentially connected along the direction vertical to the reference surface, wherein the widths of the first component, the second component and the third component in the direction vertical to the reference surface are equal; wherein the gate molding region is located on the second component.

Further, the gate molding area is symmetrically arranged with respect to the reference surface.

Further, the grid structure forms a plurality of communication holes, the communication holes are bar-shaped holes, the extending direction of the bar-shaped holes is perpendicular to the reference plane, and the plurality of communication holes are arranged at intervals along the direction perpendicular to the extending direction of the plurality of communication holes.

Further, the gate forming area is symmetrically arranged relative to the reference surface; a first welding line is arranged between every two adjacent communication holes, and at least part of the first welding line coincides with the reference surface; alternatively, the first weld line is disposed proximate to the reference surface.

Further, the grid structure forms a plurality of communication holes, the communication holes are bar-shaped holes, the extending direction of the bar-shaped holes is parallel to the reference plane, and the plurality of communication holes are arranged at intervals along the direction perpendicular to the extending direction of the plurality of communication holes.

Further, the gate forming area is symmetrically arranged relative to the reference surface; the gate forming area and the second welding line assembly are positioned on two opposite sides of the strip-shaped hole in the extending direction of the strip-shaped hole; the second welding line assembly comprises a plurality of second welding lines, the second welding lines are arranged in one-to-one correspondence with the communication holes, and each second welding line extends to the edge of the appearance piece body from the corresponding communication hole; wherein the second weld line assembly is symmetrically disposed with respect to the reference plane.

Further, a gate molding area is arranged on the non-appearance surface, and the length of the appearance piece body in any extending direction is less than or equal to 400mm.

Further, the appearance piece body is provided with a top surface, a bottom surface and side walls, wherein the top surface and the bottom surface are oppositely arranged, and the side walls extend in the circumferential direction of the appearance piece body; the top surface and the side wall are both appearance surfaces, and the bottom surface is a non-appearance surface; the gate forming area is arranged on the bottom surface and extends to the joint of the bottom surface and the side wall.

Further, the appearance piece body is provided with a top surface, a bottom surface and side walls, wherein the top surface and the bottom surface are oppositely arranged, and the side walls extend in the circumferential direction of the appearance piece body; the top surface is an appearance surface, and at least part of the side wall and the bottom surface are non-appearance surfaces; the pouring gate forming area is arranged on the bottom surface and extends to the joint of the bottom surface and the side wall; alternatively, the gate molding area is arranged on the side wall; alternatively, the gate molding region is disposed on the side wall and the bottom surface.

Further, the grid structure comprises a plurality of grid bars which are arranged in parallel, and communication holes are formed between two adjacent grid bars; the grid structure is provided with a first end and a second end which are oppositely arranged along the direction perpendicular to the reference plane; the thickness of the plurality of bars in the direction from the reference surface to the first end of the grid structure is gradually increased, and the thickness of the plurality of bars in the direction from the reference surface to the second end of the grid structure is gradually increased.

Further, the length of the gate molding region along the length direction thereof is 8mm or more; and/or the gate molding region has a width in the width direction thereof ranging from 0.6mm to 2mm.

Further, the appearance surface is provided with drawn lines, and the extending direction of the drawn lines is parallel to the flowing direction of the injection molding melt.

Further, the appearance component is made of a spray-free material comprising a substrate and particles distributed within the substrate; wherein the base material is a thermoplastic polymer material; the particles are at least one of metal particles, pearl powder and fibers.

According to another aspect of the present invention, there is provided a household appliance comprising an appearance part, an appearance surface of which forms at least part of an appearance surface of the household appliance, wherein the appearance part is the above-mentioned appearance part.

According to still another aspect of the present invention, there is provided a mold having a cavity for forming the above-described exterior part, the mold further having a gate in communication with the cavity.

Further, the gate is a fan gate.

Further, the die is also provided with a buffer runner and a melt inlet, wherein the first end of the buffer runner is communicated with the melt inlet, and the buffer runner is communicated with one end of the gate away from the die cavity, so that injection molding melt sequentially flows through the melt inlet, the buffer runner and the gate and then enters the die cavity.

The appearance part is made of a spraying-free technology, is an injection molding product and is made of a spraying-free material, the appearance part body of the appearance part comprises a grid structure, and a non-appearance surface of the appearance part body is provided with a pouring gate molding area corresponding to a pouring gate of a mold; according to the appearance part, the grating structure is symmetrically arranged relative to the reference surface, the reference surface is intersected with the second part of the grating structure, and the gate forming area is arranged on the grating structure, so that glue feeding flow balance and pressure balance can be realized, and injection molding melt almost simultaneously reaches and fills the structures at two sides of the gate forming area, so that symmetrical fountain flow is formed, appearance defects on the appearance surface are reduced, and the problem that spraying-free injection molding pieces are easy to produce appearance defects is solved; and the pressure equalization is beneficial to controlling the buckling deformation of the appearance part. In addition, the sprue forming area is arranged on the second component, so that the welding lines are orderly arranged, the arrangement is not disordered, and the appearance effect is optimized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 shows an isometric view of a first embodiment of an appearance component according to the invention;

fig. 2 shows a top view of a first embodiment of an appearance component according to the invention;

FIG. 3 shows a cross-sectional view at section A-A of the appearance component of FIG. 2;

fig. 4 shows a schematic view of a first weld line of a first embodiment of an appearance component according to the invention;

fig. 5 shows an isometric view of a second embodiment of an appearance component according to the invention;

fig. 6 shows a top view of a second embodiment of an appearance component according to the invention;

FIG. 7 shows a cross-sectional view at section B-B of the appearance component of FIG. 6; and

fig. 8 shows a schematic view of a second weld line of a second embodiment of an appearance component according to the invention.

Wherein the above figures include the following reference numerals:

10. an appearance body; 11. appearance surface; 12. a non-exterior surface; 13. a top surface; 14. a bottom surface; 15. a sidewall; 16. a first component; 17. a second component; 18. a third component; 20. a communication hole; 30. a gate; 40. a gate molding zone; 50. a reference surface; 60. a first welding line; 80. a second weld line assembly; 81. a second welding line; 90. a melt inlet; 100. buffer flow channel.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The invention provides an appearance part, please refer to fig. 1-8, wherein the appearance part is a spraying-free injection molding part, the appearance part comprises an appearance part body 10, the appearance part body 10 comprises a grid structure, and the grid structure is symmetrically arranged relative to a reference surface 50; the exterior body 10 has an exterior surface 11 and a non-exterior surface 12, the non-exterior surface 12 having a gate molding region 40 for corresponding to the gate 30 of the mold; wherein, along the direction perpendicular to the reference plane 50, the grid structure comprises a first part 16, a second part 17 and a third part 18 which are sequentially connected, and the widths of the first part 16, the second part 17 and the third part 18 in the direction perpendicular to the reference plane are equal; wherein the gate molding zone 40 is located on the second component 17.

The appearance part is made by adopting a spraying-free technology, is an injection molding product and is made of a spraying-free material, the appearance part body 10 of the appearance part comprises a grid structure, and the non-appearance surface 12 of the appearance part body 10 is provided with a gate molding area 40 corresponding to a gate 30 of a die; the appearance part is symmetrically arranged relative to the reference surface 50, the reference surface 50 is intersected with the second part 17 of the grid structure, and the gate forming area 40 is arranged on the grid structure, so that glue feeding flow balance and pressure balance can be realized, injection molding melt almost simultaneously reaches and fills the structures at two sides of the gate forming area 40, symmetrical fountain flow is formed, appearance defects on the appearance surface 11 are reduced, and the problem that spraying-free injection molding parts are easy to produce appearance defects is solved; and the pressure equalization is beneficial to controlling the buckling deformation of the appearance part. In addition, the gate molding area 40 is provided on the second member 17 to keep the weld lines in order, thereby optimizing the appearance.

The spray-free injection molding part has unique light and shadow effect and metallic luster after molding, and can achieve the appearance effect comparable to or better than spray coating without secondary treatment.

When the appearance part is injection molded by using the mold, the cavity of the mold is used for molding the appearance part, the gate 30 (may also be called a gate) is communicated with the cavity, the material in the gate 30 forms a gate molding portion, and the area where the appearance part is connected to the gate molding portion is referred to as a gate molding area 40.

When the appearance component is applied to a household appliance, the appearance surface 11 is a component of the appearance of the household appliance, that is, the appearance surface 11 is a surface that is exposed to an application environment and can be seen by a user; the non-exterior surface 12 is located inside the household appliance, i.e. the non-exterior surface 12 is a surface hidden inside the household appliance and not seen by the user.

Specifically, the width of the first member 16 in the direction perpendicular to the reference plane is unchanged, the width of the second member 17 in the direction perpendicular to the reference plane is unchanged, and the width of the third member 18 in the direction perpendicular to the reference plane is unchanged in the direction parallel to the reference plane.

In the present embodiment, the gate molding region 40 is symmetrically disposed with respect to the reference surface 50. This arrangement ensures that the incoming flow on both sides of the datum plane 50 tends to be symmetrical and balanced.

In the first embodiment, as shown in fig. 1 to 4, the grill structure forms a plurality of communication holes 20, the communication holes 20 are stripe-shaped holes, the extending direction of the stripe-shaped holes is perpendicular to the reference plane 50, and the plurality of communication holes 20 are arranged at intervals in a direction perpendicular to the extending direction thereof.

In the first embodiment, as shown in fig. 1 to 4, the gate molding region 40 is symmetrically disposed with respect to the reference surface 50; a first welding line 60 is arranged between every two adjacent communication holes 20, and at least part of the first welding line 60 coincides with the reference surface 50; alternatively, the first bonding wire 60 is disposed near the reference surface 50. Wherein the first welding lines 60 are present on the appearance surface 11, the above arrangement ensures that the first welding lines 60 are substantially located on the reference surface 50, and the distribution of the first welding lines 60 is more regular, so that the appearance component is more beautiful. It should be noted that, in the actual injection molding process, the welding line is not a straight line in an ideal state, but is a curve, so the first welding line 60 cannot completely coincide with the reference plane 50, but the above arrangement makes the distribution of the first welding line 60 more regular, so that at least part of the first welding line 60 coincides with the reference plane 50; alternatively, the first bonding wire 60 is disposed near the reference surface 50.

In the second embodiment, as shown in fig. 2 to 5, the grill structure forms a plurality of communication holes 20, the communication holes 20 are stripe-shaped holes, the extending direction of the stripe-shaped holes is parallel to the reference plane 50, and the plurality of communication holes 20 are arranged at intervals in a direction perpendicular to the extending direction thereof.

In the second embodiment, as shown in fig. 2 to 5, the gate molding region 40 is symmetrically disposed with respect to the reference surface 50; the gate molding region 40 and the second weld line assembly 80 are located on opposite sides of the strip-shaped hole in the direction of extension of the strip-shaped hole; the second welding wire assembly 80 includes a plurality of second welding wires 81, the plurality of second welding wires 81 being disposed in one-to-one correspondence with the plurality of communication holes 20, each second welding wire 81 extending from the corresponding communication hole 20 to the edge of the outer body 10; wherein the second weld line assembly 80 is symmetrically disposed with respect to the reference plane 50. Wherein each of the second welding lines 81 is substantially parallel to the extending direction of the communication hole 20, and the extending directions of the plurality of communication holes 20 are parallel. Specifically, the second weld line assembly 80 appears on the exterior surface 11, and the above arrangement ensures that the second weld line assembly 80 appears at a proper position, and makes the distribution of the second weld line assembly 80 more regular, so that the exterior part is more beautiful.

In the present embodiment, the non-exterior surface 12 is provided with a gate molding area 40, and the length of the exterior body 10 in any extending direction thereof is 400mm or less. Such an arrangement can avoid appearance defects such as flow marks, weld marks, gate marks, and the like, which are generated when a plurality of gate molding regions 40 are provided, when a plurality of injection molding melts flow; and, when the length of the appearance member body 10 in any extending direction thereof is less than or equal to 400mm, it is suitable for one gate molding area 40, and it is possible to ensure the injection molding quality of the appearance member and to avoid appearance defects.

The length of the outer body 10 in any extending direction thereof being 400mm or less means that the outer body 10 extends in a plurality of directions, and the length of the outer body 10 in any one of the plurality of directions is 400mm or less.

In the present embodiment, the outer appearance body 10 has a top surface 13, a bottom surface 14, which are oppositely provided, and a side wall 15 extending in the circumferential direction of the outer appearance body 10; the top surface 13 and the side wall 15 are both appearance surfaces 11, and the bottom surface 14 is a non-appearance surface 12; the gate molding region 40 is disposed on the bottom surface 14 and extends to the junction of the bottom surface 14 and the sidewall 15. In this way, the gate molding area 40 does not appear on the exterior surface, and the exterior surface does not have a notch due to removal of the gate molding portion.

In the present embodiment, the outer appearance body 10 has a top surface 13, a bottom surface 14, which are oppositely provided, and a side wall 15 extending in the circumferential direction of the outer appearance body 10; the top surface 13 is an appearance surface 11, and at least part of the side wall 15 and the bottom surface 14 are non-appearance surfaces 12; the gate molding area 40 is disposed on the bottom surface 14 and extends to the connection between the bottom surface 14 and the side wall 15; alternatively, the gate molding region 40 is provided on the side wall 15; alternatively, the gate molding region 40 is provided on the side wall 15 and the bottom surface 14. In this way, the gate molding area 40 does not appear on the exterior surface, and the exterior surface does not have a notch due to removal of the gate molding portion.

In this embodiment, the grid structure includes a plurality of parallel grid bars, and a communication hole 20 is formed between two adjacent grid bars; the grid structure has oppositely disposed first and second ends in a direction perpendicular to the datum plane 50; the thickness of the plurality of bars in the direction from the reference surface 50 to the first end of the grid structure is gradually increased, and the thickness of the plurality of bars in the direction from the reference surface 50 to the second end of the grid structure is gradually increased. Specifically, the thickness of the material is large, the flow of the injection melt is fast, and the flow resistance of the injection melt near the reference surface 50 is ensured to be larger than the flow resistance of the injection melt far from the reference surface 50, so that the melt can reach the opposite side of the gate forming region 40 at the same time. Wherein the direction along the plane parallel to the reference plane 50 is the y-direction in fig. 3.

The grid structure is symmetrically disposed with respect to the reference plane 50, which means that the plurality of parallel grid bars and the plurality of communication holes 20 are symmetrically disposed with respect to the reference plane 50. If the outer body 10 further includes other structures connected to the grid structure, the outer body may be disposed symmetrically with respect to the reference plane 50 or asymmetrically.

In the present embodiment, the gate molding region 40 has a length in its length direction of 8mm or more; and/or the gate molding region 40 has a width in its width direction ranging from 0.6mm to 2mm. Specifically, the length direction of the gate molding region 40 is the width direction of the gate 30, that is, the direction perpendicular to the mold opening direction of the mold; the width direction of the gate molding region 40 is the thickness direction of the gate 30, i.e., the mold opening direction of the mold. Such an arrangement ensures a low flow rate of the injection molding melt. Specifically, in the present embodiment, the length direction of the gate molding region 40 is the x direction shown in fig. 2, and the width direction of the gate molding region 40 is the y direction shown in fig. 3.

The value range is between 0.6mm and 2mm, and the value range comprises 0.6mm and 2mm.

Specifically, the gate molding region 40 is rectangular or trapezoidal.

In this embodiment, the appearance surface 11 is provided with a drawn yarn, and the extending direction of the drawn yarn is parallel to the flow direction of the injection molding melt. If flow marks appear on the appearance surface, the direction of the flow marks is in the same direction as the flow direction, and the extending direction of the wiredrawing lines is parallel to the flow direction of the melt, so that the flow marks can be covered by the lines of the wiredrawing lines, and the flow marks have a covering effect.

The drawn lines are formed on the surface of the exterior member by surface drawing treatment, which is a surface treatment means for achieving a decorative effect.

In this embodiment, the exterior part is made of a spray-free material comprising a substrate and particles distributed within the substrate; wherein the base material is a thermoplastic polymer material; the particles are at least one of metal particles, pearl powder and fibers.

Optionally, the metal particles are aluminum or copper.

Alternatively, the fibers are nylon or natural fibers.

Specifically, the appearance part can be a water receiving box cover, a base and the like, and can be suitable for a desk type water purifying and drinking machine, a floor fan and the like.

In other embodiments, the appearance surface 11 has a first gate molding region, and since the first gate molding region has gate lines, the appearance member covers or lightens the first gate molding region in the form of a label, screen printing, laser engraving, or the like. Wherein the first gate molding zone and the gate molding zone are present on the exterior part by the same implementation means.

In other embodiments, the appearance surface 11 has flow marks, and the flow marks on the appearance surface 11 are covered or reduced by adopting a form of concave-convex marks provided with decorations, sun marks, labels, silk screen printing, laser engraving and the like.

In other embodiments, the surface 11 has a weld line, and the weld line on the surface 11 is covered or weakened by a pattern of decorative concave-convex marks, sun marks, labels, silk screen, laser engraving, etc.

The invention also provides a household appliance, which comprises an appearance part, wherein the appearance surface 11 of the appearance part forms at least part of the appearance surface of the household appliance, and the appearance part is the appearance part in the embodiment.

Specifically, the household appliance may be a table-type water purifying machine, a floor fan, or the like.

The present invention also provides a mold having a cavity for forming the exterior part in the above embodiment, the mold further having a gate 30, the gate 30 being in communication with the cavity.

In the present embodiment, the gate 30 is a fan gate. The arrangement can ensure the low flow rate flow of the injection molding melt and the gate forming part is easy to remove.

Specifically, one end of the gate 30, which is in communication with the cavity, has a first communication port corresponding to the gate molding region 40, the dimension of the first communication port in the width direction of the gate 30 is greater than or equal to 8mm, and the value range of the first communication port in the thickness direction of the gate 30 is between 0.6mm and 2mm. The thickness direction of the gate 30 is a mold opening direction of the mold, and the width direction of the gate 30 is a direction perpendicular to the mold opening direction of the mold. The value range is between 0.6mm and 2mm, and the value range comprises 0.6mm and 2mm.

In this embodiment, the mold further has a buffer runner 100 and a melt inlet 90, wherein a first end of the buffer runner 100 is in communication with the melt inlet 90, and the buffer runner 100 is in communication with an end of the gate 30 remote from the cavity, so that the injection melt flows through the melt inlet 90, the buffer runner 100 and the gate 30 in sequence and then enters the cavity. The buffer runner 100 is arranged to buffer the injection molding melt and prevent appearance defects on the appearance surface 11.

Alternatively, the buffer flow channel 100 is a curved flow channel, i.e. the axis of the buffer flow channel 100 is curved.

Alternatively, the buffer flow channel 100 is an arc flow channel, i.e. the axis of the buffer flow channel 100 is an arc.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The appearance part is characterized by being a spraying-free injection molding part, the appearance part comprises an appearance part body (10), the appearance part body (10) comprises a grid structure, and the grid structure is symmetrically arranged relative to a reference surface (50);

the appearance piece body (10) is provided with an appearance surface (11) and a non-appearance surface (12), wherein the non-appearance surface (12) is provided with a gate forming area (40) corresponding to a gate (30) of the die;

wherein, along the direction perpendicular to the reference plane (50), the grid structure comprises a first component (16), a second component (17) and a third component (18) which are sequentially connected, and the widths of the first component (16), the second component (17) and the third component (18) in the direction perpendicular to the reference plane are equal; wherein the gate molding zone (40) is located on the second component (17).

2. The appearance component according to claim 1, characterized in that the gate molding zone (40) is symmetrically arranged with respect to the reference plane (50).

3. The exterior member according to claim 1, wherein the grill structure forms a plurality of communication holes (20), the communication holes (20) are stripe-shaped holes, an extending direction of the stripe-shaped holes is perpendicular to the reference plane (50), and the plurality of communication holes (20) are arranged at intervals in a direction perpendicular to the extending direction thereof.

4. A visual component according to claim 3, wherein the gate molding zone (40) is symmetrically disposed with respect to the reference surface (50); a first welding line (60) is arranged between every two adjacent communication holes (20), and at least part of the first welding line (60) is overlapped with the reference surface (50); alternatively, the first weld line (60) is disposed proximate to the reference surface (50).

5. The exterior member according to claim 1, wherein the grill structure forms a plurality of communication holes (20), the communication holes (20) are stripe-shaped holes, an extending direction of the stripe-shaped holes is parallel to the reference surface (50), and the plurality of communication holes (20) are arranged at intervals in a direction perpendicular to the extending direction thereof.

6. The appearance piece according to claim 5, characterized in that the gate molding zone (40) is symmetrically arranged with respect to the reference plane (50); the gate molding zone (40) and the second weld line assembly (80) are located on opposite sides of the strip-shaped hole in the direction of extension of the strip-shaped hole;

the second welding line assembly (80) comprises a plurality of second welding lines (81), the second welding lines (81) are arranged in one-to-one correspondence with the communication holes (20), and each second welding line (81) extends to the edge of the appearance piece body (10) from the corresponding communication hole (20);

wherein the second weld line assembly (80) is symmetrically disposed with respect to the reference plane (50).

7. The exterior part according to any one of claims 1 to 6, wherein the non-exterior surface (12) is provided with one gate molding region (40), and the exterior part body (10) has a length of 400mm or less in any extending direction thereof.

8. The appearance component according to any one of claims 1 to 6, wherein the appearance body (10) has a top surface (13), a bottom surface (14) and side walls (15) extending in a circumferential direction of the appearance body (10) which are oppositely disposed; the top surface (13) and the side wall (15) are both the appearance surface (11), and the bottom surface (14) is the non-appearance surface (12);

the gate forming region (40) is disposed on the bottom surface (14) and extends to a junction of the bottom surface (14) and the side wall (15).

9. The appearance component according to any one of claims 1 to 6, wherein the appearance body (10) has a top surface (13), a bottom surface (14) and side walls (15) extending in a circumferential direction of the appearance body (10) which are oppositely disposed; the top surface (13) is the appearance surface (11), and at least part of the side wall (15) and the bottom surface (14) are both the non-appearance surface (12);

the gate forming area (40) is arranged on the bottom surface (14) and extends to the connection part of the bottom surface (14) and the side wall (15); or alternatively

The gate molding zone (40) is disposed on the sidewall (15); or alternatively

The gate molding region (40) is disposed on the side wall (15) and the bottom surface (14).

10. The appearance part according to claim 5, characterized in that the grid structure comprises a plurality of parallel arranged bars, between two adjacent bars the communication holes (20) are provided; the grating structure has oppositely disposed first and second ends in a direction perpendicular to the reference plane (50); the thickness of the plurality of bars in the direction from the reference surface (50) to the first end of the grid structure is gradually increased, and the thickness of the plurality of bars in the direction from the reference surface (50) to the second end of the grid structure is gradually increased.

11. The exterior part according to any one of claims 1 to 6, wherein the gate molding zone (40) has a length in a length direction thereof of 8mm or more; and/or the number of the groups of groups,

the gate molding region (40) has a width in the width direction thereof ranging from 0.6mm to 2mm.

12. A household appliance comprising an appearance part, the appearance surface (11) of which forms at least part of the appearance surface of the household appliance, characterized in that the appearance part is the appearance part of any one of claims 1 to 11.

13. A mould, characterized in that it has a cavity for forming the appearance part according to any one of claims 1 to 11, the mould further having a gate (30), the gate (30) being in communication with the cavity.

14. The mold according to claim 13, characterized in that the gate (30) is a sector gate.

15. The mold of claim 13, further comprising a buffer runner (100) and a melt inlet (90), wherein a first end of the buffer runner (100) is in communication with the melt inlet (90), and wherein the buffer runner (100) is in communication with an end of the gate (30) remote from the cavity such that injection molding melt flows through the melt inlet (90), the buffer runner (100) and the gate (30) in sequence and into the cavity.